Key Performance Indicators

In Release 15, the KPI function was refined by removing the redundant measurement procedure for end-to-end latency KPI to streamline operations. Furthermore, support for network performance management was enhanced through the addition of a missing NRM (Network Resource Model) fragment. These changes were implemented within the framework of energy efficiency management, where KPIs are collected by optimization entities and reported via interfaces like Itf-N to facilitate automated energy efficiency control and coordination.

• Remove the redundant measurement of end-to-end latency KPI TS 28.552CR0002
• Add the missing NRM fragment supporting network performance management TS 28.622CR0027

In Release 16, the KPI function was enhanced to introduce new performance measurements for Virtualization Resources (VR) and QoS flows, while also extending the framework to support multi-tenant environments. The release added configurable KPI control via the NRM (Network Resource Model) and provided clarifications on which performance indicators are exposed to a tenant. Furthermore, performance measurements for the UDM (Unified Data Management) network function were updated.

• Add NF performance measurements related to VR TS 28.552CR0020
• Add QoS flow related performance measurements TS 28.552CR0047
• Add performance measurements extension to support multiple tenants environment TS 28.552CR0140
• Clarify performance indicators exposed to a tenant TS 28.552CR0220
• Add configurable KPI control NRM TS 28.622CR0069
• Update performance measurements for UDM TS 28.552CR0098

In Release 17, the KPI framework was expanded to include performance requirements and measurements for new capabilities like satellite access and interactive services. It also introduced specific performance measurements for Edge Computing procedures, including EES-EAS discovery and various registration events between ECS, EES, and EEC. Furthermore, enhancements were made to packet-based measurements and handover performance tracking, such as for DAPS handover.

• Performance requirements of interactive service TS 22.261CR0375
• Performance requirements for satellite access TS 22.261CR0428
• Add use case of network resource usage and performance prediction assisted SLS communication service Assurance TS 28.535CR0001
• DAPS handover Performance Measurements TS 28.552CR0336
• Performance measurements for ECS - EES Registration TS 28.552CR0348
• Performance measurements for EES - EAS Discovery TS 28.552CR0349

+ 7 more changes

In Release 18, the KPI framework was expanded with new performance measurements for specific network functions and scenarios. Key additions included measurements for Advanced Mobile Media Transport (AMMT), UE assistance information with release preference, connected mode power saving, and NR-NR Dual Connectivity. The release also introduced granular performance tracking for scenarios like satellite backhaul for the UPF, PLMN-level measurements in NG-RAN MOCN sharing, and data collection analytics for the NWDAF.

• Adding High-level and Performance Requirements for Ranging TS 22.261CR0506
• CR22.261v18.3.0 Adding performance requirements for AMMT TS 22.261CR0552
• Add use case of remote interference related performance measurement TS 28.552CR0375
• Add Cross Link Interference related performance measurement TS 28.552CR0415
• Add internal group ID to 5G LAN related performance measurements for SMF TS 28.552CR0416
• Add internal group ID to 5G LAN related performance measurements for UPF TS 28.552CR0417

+ 18 more changes

In Release 19, the KPI framework was expanded with new performance measurements for several emerging network functions and device types. These additions specifically cover UE-to-UE Relay operations, RedCap device early identification, eDRX negotiation procedures, and RRM measurement relaxation via UE assistance information. Furthermore, the release introduced performance measurements with PLMN granularity for network functions like the UDM, SMF, and AMF, and added or corrected measurements for PDU session establishment, UE capability messaging, and GTP capacity.

• KPI Requirements for UE to UE Relay TS 22.261CR0738
• New performance measurements for Number of UE Capability enquiry and information messages TS 28.552CR0564
• New performance measurements for Number of PDU Session Establishment Requests and Rejects TS 28.552CR0565
• New performance measurements for Reduced Capability (RedCap) Device Early Identification TS 28.552CR0610
• New performance measurements for eDRX negotiation registration requests and accepts TS 28.552CR0612
• New performance measurements for UE assistance information with RRM Measurement Relaxation feature usage TS 28.552CR0613

+ 10 more changes

In Release 20, the KPI function was enhanced with new performance measurements for aggregated performance, SSB beam-related measurements, and QoS flow fulfillment. These additions expanded the scope of monitored metrics to include more granular network performance and quality-of-service data. The updates ensured that energy efficiency control and management, which relies on such KPIs, would not adversely affect system capacity, performance, or QoS/QoE.

• Rel-20 CR TS 28.552 Aggregated Performance Measurement TS 28.552CR0715
• Rel-20 CR TS 28.552 Update purpose descriptions of performance measurements related the SSB beam TS 28.552CR0756
• Rel-20 CR TS 28.552 performance measurements for QoS flow fulfilment TS 28.552CR0736